TY  - GEN
AU  - Berkeley, Gordon Spence
TI  - Traffic and trunking principles in automatic telephony / 
U1  - 621.385,BER 
PY  - 1934///
CY  - E. Benn limited
PB  - London
KW  - Berkeley, Gordon Spence
KW  - Traffic and trunking principles in automatic telephony
N1  - Traffic In Automatic Exchange (Page-13), Trunking Schemes (Page-24), Racks and Cabling (Page-70), Full Availability (Page-116), Grading (Page-141), Design Of An Automatic Exchange (Page-174), Junction Traffic (Page-208), Traffic Recording (Page-219), Other Systems (Page-237), Miscellaneous (Page-294).	
ER  -